Modeling delay in diagnosis of NF: under reportincg, incidence and prevalence estimates
In this paper, we analyze data from the Italian National Register of Rare Diseases (NRRD) focusing, in particular, on the geo-temporal distribution of patients affected by neurofibromatosis type 1 (NF1, ICD9CM code 237.71). The aim is at deriving a corrected measure of incidence for the period 2007--2009 using a single source, and to provide NF1 prevalence estimates for the period 2001--2006 through the use of capture--recapture methods over two sources. In the first case, a reverse hazard estimator for the delay in diagnosis of NF1 is used to estimate the probability that a generic unit belonging to the population of interest has been registered by the archive of reference. For the second purpose, two-source capture--recapture methods have been used to estimate the number of NF1 prevalent units in Italy for the period 2001--2006, matching information provided by the NRRD and the national register of hospital discharge, Scheda di Dimissione Ospedaliera (in the following SDO), archives.
Volume (Year): 39 (2012)
Issue (Month): 4 (August)
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